Cloth cutting machine



Dec. 4, 1934. J. B. GURY, JR'

CLOTH CUTTING MACHINE Filed July 5,. 1952 Fig.1.

2 SheetsSheet l "E -mum- IIIIIIIIIII-IIIIIIIIIII will! w; 1, 712 a I? J.B. GURY, JR v 1,983,129

CLOTH CUTTING MACHINE Dec. 4, 1934.

Filed July 5, 1932 2 Sheets-Sheet 2 Patented Dec. 4, 1934 PATENT OFFICE1 1,983,129 CLOTH CUTTING MACHINE John B. Gury, In, St. Louis, Mo.,assignor to J; B. Gury Mfg. (30., St. Louis, Mo., a corporation ofMissouri Application July 5, 1932, Serial No. 620,748

15 Claims. (Cl. 164-76) This invention relates to cloth cuttingma--chines, and has special reference to an improved sharpener for therotary blade of a cloth cutter. An object of the invention is to equip acloth cutter havinga rotary blade with spaced sharpener members adaptedto operate against opposite sides of the marginal cutting edge of thero- 10- sharpener members.

Another object of the invention is to provide an improved support andoperating means for the sharpener members whereby said members are movedin a straight line toward and away from ji-the blade; so that thesharpener members engage on opposite sides of the cutting edge of theblade in the same relative relationship irrespective of the extent towhich the blade may becomeworn. 1 I H i "Another object of the inventionis to provide an improved operating means for the sharpener members.

1 Another object of the inventionis'to provide an improved guard deviceadapted to extend 1 downwardly beyond the front of the circular blade,and means for supporting the guard in different adjusted positions.

Another object of the invention is to provide an improved mounting forsupporting the rotary sharpener members for independent relativerotation. 1 I

1 Various other objects and advantages will appear from thefollowingdescription, reference being made to the accompanying drawings, in3j.which-- 1 Fig. 1 is a plan view of a cloth cutter embodving thepresent invention.

Fig. 2 is a side elevation looking toward the circular cutter.

Fig. 3 is a side elevation showing the opposit side of the machine. I

Fig. 4 is a front elevation.

Fig. 5 is a slightly enlarged sectional view showing thesharpenermembers, and the devices by iwhich they are mounted andsupported for independent rotation. I

Fig. 6 is across sectional view on the line 6'6 of Fig. 5.

Fig. 7 is a diagrammatic view illustrating the is embodied comprises abase 1 supportedby rollers 2 adapted to operate along a table or othersurface upon which the cloth to be cut is sup-1 ported.

A frame, comprising an upright portion 3 and a socket 4, is attached tothe base 1. A spiral gear wheel 5 is rotatively supported by the frame 3and is covered by a plate 6. The spiral gear wheel 5 engages and rotatesa pinion '7 in connection with the rotary circular cutting blade 8. Themotor frame 9 has a part 10 extending into the sooket4 and the shaft ofsaid motor is geared to the spiral gear 5, so that when the motor isrunning the gear 5 is rotated and said gear rotates the gear 7 andthereby the circular cutting disc 8. l

A handle 11 is attached to the socket 4 and constitutes means formanually moving the machine along the table or support on which themachine is mounted and while the circular cutter 8 is rotating. v

A bracket arm 12 extends upwardly and forwardly from the upper portionof the frame 3 and is formed with a pair of spaced flanges 13, to theedges of which a retaining plate 14 is detachably secured by fasteners15;

A support16'is'mounted for sliding movements in the space enclosed bythe bracket '12, the flanges 13 and the plate 14. Thissupportlfiinclines upwardly and forwardly and is formed on its lowerendwith a split bearing 17. A stem 18 extends through the part '19 of thesplit bearing and screws into the part20 of said bearing and isoperative to clamp the bearing upon a tubular bushing 21 or to releasesaid bearing from clamping engagement on said bushing so as to permitthe bushing to beremoved and replaced, as desired. i

"The axis of the bushing 21 is inclined in two directions with respectto theaxis of the circular cutter 8. As shown, the bracket arm 12 isat-. tached to the opposite side of the frame 3 from thecircular cutter8 and the sliding support 16 is mounted on the opposite side of thebracket arm from the cutting disc. laterally beyond the sliding support16 on the side opposite from'the circular disc 8 and the axis ofsaid'bearing 1'7 inclines forwardly and also inclines downwardlyfrom thesupport 16,

the axis of said bearing being thus inclined in 5 two directions withrespect to the .axis of the circular disc 8.

An abrading cup-shaped sharpener member, comprising a circular taperedwall 22 and an end wall 23, is mounted on the threaded end of a 116 Thebearing 17 projects 5 sleeve 24 rotatively supported within the bushing21. A circumferential flange 25 formed on said sleeve 24 abuts againstthe end of the bushing 21 and constitutes an abutment for the end wall23 of the sharpener member mounted thereon. A nut 26 is screwed on theend of the sleeve 24 against the wall 23 and thus cooperates with theflange 25 to clamp the wall 23 in connection with the sleeve 24.

An axle member 27 is formed with a circumferential rib 28, constitutingan abutment for one end of a hub 29 mounted on said axle member. The hub29 is formed with a circumferential flange 30 against which the'end wall31 of a cupshaped sharpener member is clamped by a nut 32 screwed onsaid hub 29. The tapered circular wall 33 of this sharpener member isseparated from the end of the circular wall 22 of the cooperatingsharpener member by a space 34 designed and adapted to receive themarginal portion of the circular cutter disc 8 when the sharpener is inuse. A screw 35 is screwed into the end of the axle member 27 and holdsthe hub 29 on said axle member for independent rotation about the axlemember 27.

A nut having a threaded hole therethrough and comprising a. body portion36 and an exteriorly threaded extension 37 is screwed on the threadedend of the axle member 2'? and abuts against the end of the bushing 21.The threaded extension 37 of this nut is screwed into the threaded endof the sleeve 24, thus securing the axle member 27 to said sleeve forrotation therewith, leaving the sharpener member 3133 free to rotateindependently of the axle 2'7 and independently of the sharpener member22-23. Since the hub 29 is not capable of longitudinal movement alongthe axle member 27 but is held from longitudinal movement by the flange28 and the screw 35; and since the axle member 27 is incapable oflongitudinal movement with respect to the sleeve 24, it is clear thatthe two sharpener members are incapable of movement toward and away fromeach other but are held in spaced relationship and separated by a space34 that will receive the peripheral cutting edge of the circular cutter8. Since the axis of the bearing 1'? is inclined in two directions withrespect to the axis of the circular cutter 8, it is clear that the axisof the sharpener device, comprising the two sharpener members, is alsoinclined in two directions with respect to the axis of the circularcutter 8.

A spring 38 has its upper end connected with the plate 14 and its lowerend connected with the sliding support 16. The power of this spring isutilized'to uphold the sliding support 16 in its uppermost position, butsaid spring will yield to permit the support 16 to be moved downwardlyto engage the cutter members with the circular cutting blade. A lever 39has one end extending over a pin 40 projecting laterally from thehearing portion 20 and the opposite end of said'lever is mounted on apivot 41. An arcuate rack 42 is formed in connection with the pivotedend of the lever 39 and engages an arcuate rack 43 formed on theadjacent end of a lever 44 mounted on a pivot 45. The pivots 41 and 45are supported by the frame 3. The lever 44 is formed with a handleportion 46 on its free end. In the construction and arrangement shown,depression of the handle 'end 46 of the lever 44 will operate the lever39 in a direction to move the sliding support 16 downwardly inopposition to the power of the spring 38. This movement of the slidingsupport 16 is in a straight line and since the axis of the two sharpenermembers is inclined in two directions with respect to the circularcutting blade 8, it is clear that the edge of said cutting blade will bereceived in the space 34 and will be engaged at circumferentially spacedpoints by the ends of the walls 22 and 33 of the respective sharpenermembers. Engagement of the walls 22 and 33 of the respective sharpenermembers with circumferentially spaced portions of the circular cuttingdisc is diagrammatically illustrated in Figs. 7 and 8, it being clearthat the points of engagement of said cutting members with the circularblade are spaced circumferentially and are not on directly oppositesides.

This novel mounting of the cutting members constitutes a feature ofunusual convenience in a device of this type. By merely loosening theclamping screw 18, the clamping engagement of the bearing 17 on thebushing 21 is released and the sharpener device may be removed as a unitfrom the sliding support 16 therefor. The various parts and features ofthe sharpener device are separate and detachable, so that the sharpenerdevice may be disassembled and any damaged or broken parts may be easilyrepaired and replaced.

Another important feature of the invention is the direct straightmovement of the sharpener device toward the circular cutting blade. Thisengages the sharpener members with the cutting blade in the samerelationship irrespective of the extent to which these parts may becomeworn. A better grinding and sharpening action and effect is obtainedthan is possible by an arcuate or other movement of the sharpener devicetoward the blade.

A guard comprises a rod '47 mounted for longitudinal sliding movementsin spaced bearings 48 detachably secured to the bracket 12 by fasteners49. A spring plate 50 is mounted between the bearings 48 andfrictionally engages the guard 4'7 with sufiicient pressure to supportand sustain said guard in any of .its longitudinally adjusted positions.An enlarged head 51 is formed on the lower end of the guard 47 and isdesigned and adapted to operate above the cloth or the plies of clothbeing cut by the machine. A collar 52 is mounted on the guard 47 and isequipped with a clamping set screw 53 operative into and out of clampingengagement with the guard 47 to secure the collar in any adjustedposition along said guard and thus limit extent of downward movement ofthe guard through the bearings 48. After the machine has been moved tothe extent desired to cut the cloth, it is apparent that the upper pliesof cloth are cut'to a greater extent than the lower plies which extendunder the forward portion of the circular blade. When the machine ismoved to the extent desired, the guard 47 is raised and the cloth may beraised to bring the lower plies of cloth opposite the forward edge ofthe cutting blade and thereby cut all of the plies of cloth to the sameextent and to the same distance.

It is now clear that this invention obtains allof its intended objectsand purposes most emciently and satisfactorily. The construction andarrangement of the parts comprising the invention and the relationshipthereof may be varied within the scope of equivalent limits withoutdeparture from the nature and principle of the invention. I do notrestrict myself in any unessential particulars, but what I claim anddesire to secure by Letters Patent is:

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451 and thereby said sharpener members in a straight blade to cause theperiphery of said blade to extend into the-space between and engagecircumferentially spaced points respectively with said membersL- 2. In amachine of the character described; a rotary circular blade,- a pair ofspaced rotary sharpener members supported on an axisinclined intwodirections with respect to the axis of said bladeand separated byanintervening spacey; re-' silient means supporting said sharpener.members away from said blade, and mechanism for moving said sharpenermembers toward said blade in opposition to said resilient means to placesaid sharpener members in contact with opposite sides of said blade incircumferentially spaced positions.

3 In a machineof the character described having a rotary circular bladeand mechanism for rotating said blade, a pair of rotary sharpenermembers mounted for rotation about an axis inclined in two directionswith respect to the axis of said blade and separated by an interveningspace, resilient means supporting said sharpener members away from saidblade, and mechanism for moving said sharpener members in a straightline in opposition to said resilient means to position to contact withopposite sides of said blade at circumferentially spaced points ofcontact.

4. In a machine of the character described, a rotary circular blade, asliding support movable in a straight line toward and away from saidblade, means for holding said support away from said blade, a pair ofrotary sharpener members carried by said support for rotation about anaxis inclined in two directions with respect to the axis of said bladeand separated by an intervening space, and means for moving said supportline toward said blade to position to place said sharpener members incontact with opposite sides of said blade at circumferentially spacedpoints of contact.

5. In a machine of the character described, a supporting frame, a rotarycircular blade supported by said frame, a slide supported by said framefor movement in a straight line toward and away from said blade, abearing supported by said slide and having an axis inclined in twodirections with respect to the axis of said blade, a pair of rotarysharpener members, means mounted in said bearing for rotativelysupporting said sharpener members for rotation on said axis that isinclined in two directions with respect to the axis of said blade, meansfor supporting said slide in position in which said sharpener membersare out of contact with said blade, and means for moving said slide toengage said blade in the space between said sharpener members.

6. In a machine of the character described, a rotary circular blade, abearing having an axis inclined with respect to the axis of said blade,a sleeve member rotatively mounted in said hearing, a sharpener membersupported by said sleeve member for rotation therewith, an axle membersupported by said sleeve member, a sharpener member supported by saidaxle member and separated from said first sharpener member by anintervening space, both of said sharpener members beingrotative aboutsaid inclined axis, and mechanism for moving said sharpener members toengage circumferentially spaced portions of opposite sides of saidblade.

-7 Ina machine of the character described, a bearing, a bushing mountedin said bearing, means for clamping said bearing on and releasing saidbearing from clamping engagement with said bushing, a sleeve rotative insaid bushing, means forholding said sleeve in said bushing, an axlemember rotatively supported by said sleeve, sharpener members supportedby said sleeve and. said axle member respectively, means for holdingsaid sharpener members in spaced relationship, and means for moving saidsharpener membersto and from effective positions.

8,. A machine'of the character described having a circular bladerotative about a horizontal axis, a support having an axis inclined intwo directions with respect to the axisof said blade, a sharpener devicemounted on said support and having a space adapted to receive themarginal cutting edge of said blade, resilient means holding saidsupport away from said blade, and mechanism for moving said support inopposition to said resilient means to position in which the peripheralcutting edge of said blade extends into said space and in which saidsharpener device engages opposite sides of said blade atcircumferentially spaced points of contact.

9. In a machine of the character described, a circular blade rotativeabout a central axis, a support having an axis inclined in twodirections with respect to the axis of said blade, a rotary sharpenerdevice mounted on said support and having a space for receiving theperipheral cutting edge of said blade, resilient means holding saidsupport away from said blade, and mechanism for moving said support andthereby said sharpener device in opposition to said resilient means in astraight line into contact with said blade in position in which theperipheral portion of said blade extends into said space.

10. In a machine of the character described, a circular blade rotativeabout a central axis, a support having an axis inclined in twodirections with respect to the axis of said blade, a rotary sharpenerdevice mounted on said support and having a space for receiving theperipheral cutting edge of said blade, mechanism for moving said supportand thereby said sharpener device in a straight line into contact withsaid blade in position in which the peripheral portion of said bladeextends into said space and in which said sharpener device engagesopposite sides of said blade at circumferentially spaced points, andmeans for moving said support and said sharpener device out ofengagement with said blade.

11. In a machine of the character described, a rotary circular blade, asharpener device supported on a single axis of rotation, manual meansfor moving said sharpener device in a straight line into and out ofengagement with opposite sides of said blade equidistant from theperiphery thereof and at circumferentially spaced points of contact, andan actuator other than said manual means for moving said sharpenerdevice away from said blade.

12. In a machine of the character described, a rotary circular blade, asharpener device supported on a single axis of rotation, a springsupporting said sharpener device out of engagement with said blade andoperating to move said sharpener device from engagement with said blade,and mechanism for moving said sharpener device in a straight line intoengagement with opposite sides of said blade equidistant from theperiphery thereof and at circumferentially spaced points of contact.

13. In a machine of the character described, a blade supported forrotation about a centralaxis, a rotary supporting member mounted forrotation about an axis inclined in two directions with respect to theaxis of said blade, asharpener device mounted on said supporting memberand having a space for receiving the marginal cutting edge of saidblade, and mechanism for moving said supporting member in a straightline to position in which the marginal-cutting edge of said bladeextends into said space and in which position said sharpener devicesimultaneously engages opposite sides of said blade along lines'o'fcontact ofequal width and at circumferenti'ally spaced points-ofcontact.

14. In a machine of the character described, a blade supported forrotation about a central axis, a rotary supporting member mounted forrotation about an'axis inclined in two directions with respect to theaxis of said blade, a sharpener device mounted on said supporting memberand having aspace for receiving the marginal cutting edge of said blade,mechanism'for moving said supporting member in a straight line toposition in which the marginal cutting edge of said blade extends intosaid space and in which position said sharpener device simultaneouslyengages opposite sides of said blade along lines of contact of equalwidth and at circumferentially spaced points of contact, and a removablesupport in which said supporting member is mounted.

1 5. A machine of the character described comprising a rotary circularblade, a pair of spaced rotary sharpener members supported on the sameaxis of rotation, mechanism for moving said sharpener members in astraight line to contact said sharpener members simultaneously withopposite sides of the marginal portion of said blade and extending fromthe periphery to points equidistant from the periphery of said blade incircumferentially spaced relationship, and automatic means for movingsaid sharpener members from said blade.

JOHN B. 'GURY, JR.

